Turkey at 'final stage' with Russia over S-400 missile system: Defense minister

Turkey's talks with Russia about the purchase of the S-400 air missile defense system have reached a "final stage", although this does not mean a deal will be signed immediately, Defense Minister Fikri Isik said on Friday.Isik also told a news conference that NATO countries have not presented a "financially effective" offer on an alternative defense system.NATO member Turkey in 2015 canceled a $3.4 billion tender for a long-range missile defense system that had been provisionally awarded to Chin